The seat has a casing (2) with a backrest (3) having proximal and distal edges (8, 9). A rotation axle (6) of a foldable base (7) is mounted on the base. The backrest has two units (3a, 3b) presenting scapular and lumbar supports, respectively. The unit (3...

The seat has a casing (2) with a rotatable base (3) and a backrest that has a lower unit constituting a lumbar support and an upper unit (5) constituting a scapular support (5A) on its one face. The casing has mounting points for a rotation axle of the upp...